/* validate.js: Client-side input validation Usage:alert * Within a script tag in the section on the page, include: * language=JScript src=validate.js To apply keystroke constraint, include within the

tag: onKeyPress="return allow_keypress();" onKeyPress="return top.allow_keypress( event.srcElement, event.keyCode );" To apply submit constraint, include within the tag: onSubmit="return top.allow_submit( this );" To apply blur constriction, include within the tags: onBlur="top.snip( this );" Within blur constriction, to return to the faulty text field: onBlur="if(top.snip( this ) != true) this.focus();" ...or to select (highlight) the text field upon return: onBlur="if(top.snip( this ) != true) this.select();" Within every element you want to validate, include a type: Within every element you want to make required, include type 'Reqd': Validation Types: numr: number real, test for real numbers only nonnegative, allows decimals numsi: number allows negatives and positive integers numi: number integer does not allow negative numbers Tinyi: tinyint( 1 byte), this is used to check that the field does not exceed the SQL tinyint datatype limit of 255 and the same checking of numi Cur: Currency, test for two decimal places Year: 4-digit positive integers for representing year (should not greater than current year??) SmMon: currency, this is used to check that the field does not exceed the SQL Small Money datatype limit of 214,748.3647 also does the same checking of numr ZipC: checks to see if we pass a valid zipcode ZipL: checks to see if we pass a proper list of zipcodes num3: checks to see if we pass 3 numbers num4: checks to see if we pass 4 numbers SSN: checks for valid Social Security Number format Date: checks for valid dates. MUST also include one of these secondary types: Past: when expecting a date in the past Futr: when expecting a date in the future PorF: when expecting a date that could be Past or Future */ var server_time = new Date(); //daysInMonth is an array used for checking valid dates var daysInMonth = new Array(); daysInMonth[1] = 31; daysInMonth[2] = 29; // must check this daysInMonth[3] = 31; daysInMonth[4] = 30; daysInMonth[5] = 31; daysInMonth[6] = 30; daysInMonth[7] = 31; daysInMonth[8] = 31; daysInMonth[9] = 30; daysInMonth[10] = 31; daysInMonth[11] = 30; daysInMonth[12] = 31; // L0 Typechecking function is_str_empty( str ) { return ! str.match( /\S/ ); } function is_el_type( el, type ) { return el.getAttribute( type ) != null; } // L1 function type_of_el( el ) { if( is_el_type( el, "Date" ) ) { return "Date"; } else if( is_el_type( el, "SmMon") ) { return "SmMon"; } else if( is_el_type( el, "NumR" ) ) { return "NumR"; } else if( is_el_type( el, "NumI" ) ) { return "NumI"; } else if( is_el_type( el, "NumL" ) ) { return "NumL"; } else if( is_el_type( el, "Date" ) ) { return "Date"; } else if( is_el_type( el, "ZipC" ) ) { return "ZipC"; } else if( is_el_type( el, "Feet" ) ) { return "Feet"; } else if (is_el_type( el, "ZipL" ) ) { return "ZipL"; } else if (is_el_type( el, "NumSI") ) { return "NumSI"; } else if (is_el_type( el, "Year") ) { return "Year"; } else if (is_el_type( el, "num3") ) { return "num3"; } else if (is_el_type( el, "num4") ) { return "num4"; } else if (is_el_type( el, "Tinyi") ) { return "Tinyi"; } else if (is_el_type( el, "SSN") ) { return "SSN"; } else if (is_el_type( el, "Cur") ) { return "Cur"; } else return ""; } // L1 The bad_* functions: single datatype checking function bad_NumI( str ) { return isNaN( parseInt( str ) ); } function bad_NumR( str ) { return isNaN( parseFloat( str ) ); } function bad_Date( str ) { return ! Date.parse( str ); } function bad_ZipC( str ) { return ! str.match( /(\d{5}(-\d{4})?)/ ); } function bad_NumL( str ) { return ! str.match( /(\d+(\s*,\s*\d+)*)/ ); } function bad_Feet( str ) { return ! (str.match( /((\d+)\s*'\s*(\d+))/ ) || str.match( /(\d+(\.\d*)?|(\.\d+))/ )); } function bad_ZipL( str ) { return ! str.match( /(\d+(\s*,\s*\d+)*)/ ); } function bad_NumSI( str ) { return ! str.match( /(^[-]?[0-9]*$)/ ); } function bad_SmMon( str ) { return isNaN( parseFloat( str ) ); } function bad_Year( str ) { return ! str.match ( /(\d{4})/ ); } function bad_num3( str ) { return ! str.match ( /(\d{3})/ ); } function bad_num4( str ) { return ! str.match ( /(\d{4})/ ); } function bad_Tinyi( str ) { return isNaN( parseInt( str ) ); } function bad_SSN( str ) { return ! str.match( /(\d{3}-\d{2}-\d[4])/ ); } function bad_Cur( str ) { return isNaN( parseFloat( str ) ); } // L1 The snip_* functions: try to find a qualifying value in the input function snip_NumI( el ) { return el.value.match( /(\d+)/ ) ? RegExp.$1 : false; } function snip_NumR( el ) { return el.value.match( /(\d+(\.\d*)?|(\.\d+))/ ) ? RegExp.$1 : false; } // NumSI: positive and negetive integer without leading 0s function chop_leading_0s (el) { if (el.value.match(/(^[-][0]+[0-9]+$)/)) { if (el.value.match(/(^[-][0]+$)/)) return 0; else { var result = el.value.replace(/(^[-]*[0]+)/, '' ); return "-" + result; } } else if (el.value.match(/(^[0]+[0-9]+$)/)) { var result = el.value.replace(/(^[-]*[0]+)/, '' ); return result; } else if (el.value.match(/('')/)) { return 0; } else { return el.value; } } function snip_NumSI ( el ) { //return el.value.match( /(^[-]?[0-9]*)/)? RegExp.$1 : false; // no leading 0s if (el.value.match (/(^[-]?[1-9]+[0-9]*$)/)) return el.value.match (/(^[-]?[1-9]+[0-9]*$)/) ? RegExp.$1 : false; else if (el.value.match ( /(^[-]?[0-9]*$)/)) return el.value.match( /(^[-]?[0-9]*$)/)? chop_leading_0s( el) : false; } function snip_Year ( el ) { var thisyear = el.value; if( thisyear.match(/^\d\d\d\d\d+/) || thisyear.match(/^\d\d\d$/) || thisyear.match(/^\d$/) ) { //alert( thisyear + " is an invalid year" ); return false; } else { if ( thisyear.match (/^\d\d$/) ) { if ( thisyear > 20 ) { var fullyear = "19" + thisyear; } else { var fullyear = "20" + thisyear; } return fullyear; } else { return el.value.match( /(\d{4})/ ) ? RegExp.$1 : false; } } } function snip_Tinyi(el) { var tiny = el.value; if (tiny <= 255 ) { return tiny; } else { return false; } } function daysInFebruary( year ) { // February has 29 days in any year evenly divisible by four, // EXCEPT for centurial years not also divisible by 400. var fourth = !(year % 4); var century = !(year % 100); var fourhund = !(year % 400); return (fourth && !century || fourhund) ? 29 : 28; } function isDate( year, month, day ) { // General check switch (month) { case "01": if( day > 31 ) return false; break; case "03": if( day > 31 ) return false; break; case "04": if( day > 30 ) return false; break; case "05": if( day > 31 ) return false; break; case "06": if( day > 30 ) return false; break; case "07": if( day > 31 ) return false; break; case "08": if( day > 31 ) return false; break; case "09": if( day > 30 ) return false; break; case "10": if( day > 31 ) return false; break; case "11": if( day > 30 ) return false; break; case "12": if( day > 31 ) return false; break; } //if( day > daysInMonth[month] ) return false; // Leap year check if( (month == 2) && (day > daysInFebruary( year )) ) return false; return true; } function snip_SmMon(el) { var money = el.value; if (money <= 214748.36) { return money; } else { return false; } } function snip_date_replace( el ) { var chdate = /(\d\d?)/g; var result = el.value.match( chdate ); var month = result[0]; var day = result[1]; if (result[2] > 20) { var year = "19"+result[2]; } else { var year = "20"+result[2]; } var enter_date = new Date( year, month - 1 , day ); if( !(isDate( year, result[0], result[1] )) ) { el.value = result[0]+"/"+result[1]+"/"+year; alert( el.value+" is an invalid date" ); return false; } if( is_el_type( el, "Futr" ) ) { if( Date.parse(enter_date) < Date.parse(server_time) ) { el.value = month+"/"+day+"/"+year; alert("Your date here must be a date in the future"); return false; } } else if( is_el_type( el, "Past" ) ) { if( Date.parse(enter_date) > Date.parse(server_time) ) { el.value = month+"/"+day+"/"+year; alert("Your date here must be today's date or a date in the past"); return false; } } else { } // Okay to have neither Past nor Futr if( result[2] != null ) { if( result[2].match( /\d{2}/ ) ) { return month+"/"+day+"/"+year; } } return false; } function snip_Date( el ) { var chdate = /(\d+)/g; var result = el.value.match( chdate ); var enter_date = new Date( result[2], result[0] - 1, result[1] ); if( (result[2] == null) || (result[0] == null) || (result[1] == null) ) { alert( el.value+" is an invalid date" ); return false; } if( result[2].match(/\d\d\d\d\d+/) || result[2].match(/^\d\d\d$/) || result[2].match(/^\d$/) ) { alert( result[2] + " is an invalid year" ); return false; } if( (result[0] < 1) || (result[0] > 12) ) { alert( result[0] + " is an invalid month" ); return false; } if( (result[1] < 1) || (result[1] > 31) ) { alert( result[1] + " is an invalid day" ); return false; } var year = result[2]; if( year.match( /\d{4}/ ) ) { if( is_el_type( el, "Porf" ) ) { } // Okay to have neither Past nor Futr else if( is_el_type( el, "Futr" ) ) { if( Date.parse(enter_date) < Date.parse(server_time) ) { alert("Your date here must be a date in the future"); return false; } } else if( is_el_type( el, "Past" ) ) { if( Date.parse(enter_date) > Date.parse(server_time) ) { alert("Your date here must be today's date or a date in the past"); return false; } } else { } // Okay to have neither Past nor Futr if( !(isDate( year, result[0], result[1])) ) { alert( el.value+" is an invalid date" ); return false; } } return el.value.match( /(\d\d?\/\d\d?\/\d{4})/ ) ? RegExp.$1 : snip_date_replace(el); } function snip_ZipC( el ) { return el.value.match( /(\d{5}(\-\d{4})?)/ ) ? RegExp.$1 : false; } function snip_num3( el ) { return el.value.match( /(\d{3})/ ) ? RegExp.$1 : false; } function snip_num4( el ) { return el.value.match( /(\d{4})/ ) ? RegExp.$1 : false; } function snip_ZipL( el ) { var val = el.value; var flag = true; var myval = ""; var str = ""; var zipcode = new Array(); str = str + "," + val + ","; zipcode = str.split(/\s*,\s*/); for( mycount= 0; mycount < zipcode.length; mycount++ ) { str2 = zipcode[mycount]; if( (str2.length > 5 ) || (str2.search(/\s+/)!= -1) ) { alert(zipcode[mycount] + " is an invalid zip code."); return false; } if( zipcode[mycount]!= null ) { myval = myval + zipcode[mycount] + ","; } } if( myval != "" ) { myval2 = myval.slice(0,-1); return myval2; } } function snip_NumL( el ) { var val = el.value; val = val.replace( /[ ,+]+/g, ", " ); return val.match( /(\d+(\s*,\s*\d+)*)/ ) ? RegExp.$1 : false; } function snip_Feet( el ) { var val = el.value; var finalFeet; if( val.match( /^\s*$/ ) ) { return; } else if( val.match( /(\d+)\s*'\s*(\d+)/ ) ) { // Can we get feet'inches" ? var feet = parseInt( RegExp.$1 ); var inch = parseInt( RegExp.$2 ); finalFeet = feet + ( inch / 12 ); } else if( val.match( /(\d+(\.\d*)?|(\.\d+))/ ) ) { var finalFeet = RegExp.$1; } else { alert( "'" + val + "'" + " does not appear to be a valid number." ); return; } return Math.round( 100 * finalFeet ) / 100; } function snip_SSN( el ) { return el.value.match( /(\d{3}-\d{2}-\d{4})/ ) ? RegExp.$1 : false; } function snip_Cur( el ) { var val = el.value; var amt; if( val.match( /(\d+(\.\d{1,2})?|(\.\d+))/ ) ) { amt = RegExp.$1; if( val.indexOf( "." ) != -1 ) { amt = amt.concat( "00" ); return amt.match( /(\d+(\.\d{2}))/ ) ? RegExp.$1 : false; } else { return amt; } } else { return; } //return el.value.match( /(\d+(\.\d{1,2})?|(\.\d+))/ ) ? RegExp.$1 : false; } // L2 Element-scope data type validation function type_failed( el ) { var val = el.value; var type = type_of_el( el ); var bad; if( type.length ) { eval( "bad = bad_" + type + "( val );" ); } return bad? type : ""; } // L2 Descriptive "bad value" alert function alert_val_type( val, type ) { var name = "value"; switch( type ) { case "NumI": name = "whole number"; break; case "NumR": name = "decimal number"; break; case "Year": name = "year"; break; case "ZipC": name = "ZIP code"; break; case "NumL": name = "number list"; break; case "Date": name = "date"; break; case "Feet": name = "length"; break; case "ZipL": name = "Zip Code list"; break; case "num3": name = "Format"; break; case "num4": name = "Format"; break; case "SmMon": name = "Small Money Field";break; case "NumSI": name = "integer"; break; case "Tinyi": name = "Tiny Int Field. The number is too big"; break; case "SSN": name = "Social Security Number"; break; case "Cur": name = "dollar value" } alert( "Your entry: \"" + val + "\" is not a valid " + name + "." ); } // L3 Make field contents fit type, if possible function snip( el ) { if( is_str_empty( el.value ) ) { return true; } var type = type_of_el( el ); eval( "var rv = snip_" + type + "( el );" ); if( rv ) { el.value = rv; return true; } else if( type == "Date" ) { return false; } else if( type == "ZipL" ) { return false; } else { alert_val_type( el.value, type ); return false; } } // L3 Form-scope validation on submit function allow_submit( the_form ) { var each_elem; var fail_type = ""; var fail_reqd = ""; var tot_elems = the_form.elements.length; var leasetype; var minvalue; var maxvalue; // Check every element of the form for( each_elem=0; each_elem < tot_elems; each_elem++ ) { var cur_elem = the_form.elements[each_elem]; // If the field is empty if( is_str_empty( cur_elem.value ) ) { // If it's required, that's an error if( is_el_type( cur_elem, "Reqd" ) ) { fail_reqd = cur_elem.title; if( !fail_reqd.length ) { fail_reqd = cur_elem.name; } alert( fail_reqd + " is a required field." ); break; } } // Else there's something to check for else { fail_type = type_failed( cur_elem ); if( fail_type.length ) { alert_val_type( cur_elem.value, fail_type ); break; } } } // If a rule was broken, the form fails if( fail_reqd.length || fail_type.length ) { cur_elem.focus(); return false; } else { return true; } } // L3 Form-scope constraint on keypress function allow_keypress( el, keyC ) { //var el = event.srcElement; var ok_keys = ""; var CR = unescape("%0d"); // Add to NumL for ie5 and quickMLS. // If NumI is in the tag, it must be an integer. Et c. if ( is_el_type( el, "NumI" ) ) { ok_keys = "0123456789"; } else if( is_el_type( el, "NumR" ) ) { ok_keys = "0123456789."; } else if( is_el_type( el, "Num3" ) ) { ok_keys = "0123456789"; } else if( is_el_type( el, "Num4" ) ) { ok_keys = "0123456789"; } else if( is_el_type( el, "SmMon" ) ) { ok_keys = "0123456789."; } else if( is_el_type( el, "NumL" ) ) { ok_keys = "0123456789,+ " + CR; } else if( is_el_type( el, "ZipC" ) ) { ok_keys = "0123456789-"; } else if( is_el_type( el, "Date" ) ) { ok_keys = "0123456789/"; } else if( is_el_type( el, "Feet" ) ) { ok_keys = "0123456789.'\"" } else if( is_el_type( el, "ZipL" ) ) { ok_keys = "0123456789,+ " + CR; } else if( is_el_type( el, "NumSI") ) { ok_keys = "0123456789-"; } else if( is_el_type( el, "Tinyi" ) ) { ok_keys = "0123456789"; } // If it is a constrained field, test it if( ok_keys.length ) { return ok_keys.indexOf( String.fromCharCode( keyC ) ) > -1; } return true; } // L3 Set multi-select default function ResetMultiSelect( chobj, defaultText ) { if( chobj.value == "" ) { chobj.options[0].selected = true; } if( chobj.options[chobj.selectedIndex].text == defaultText ) { for( var i=1; i < chobj.length; i++ ) { if( chobj.options[i].selected ) { chobj.options[0].selected = false; } } } }