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Validation with JavaScript

Posted by Praveen Kumar on February 14, 2008

Given by Sreekanth S Rameshaiah(MAHITI INFOTECH PVT LTD)

function MM_validateForm() { //v4.0
  if (document.getElementById){
    var i,p,q,nm,test,num,min,max,errors=”,args=MM_validateForm.arguments;
    for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);
      if (val) { nm=val.name; if ((val=val.value)!=””) {
        if (test.indexOf (‘isEmail’)!=-1) { p=val.indexOf(‘@’);
          if (p<1 || p==(val.length-1)) errors+=’- ‘+nm+’ must contain an e-mail address.\n’;
        } else if (test!=’R’) { num = parseFloat(val);
          if (isNaN(val)) errors+=’- ‘+nm+’ must contain a number.\n’;
          if (test.indexOf(‘inRange’) != -1) { p=test.indexOf(‘:’);
            min=test.substring(8,p); max= test.substring(p+1);
            if (num<min || max<num) errors+=’- ‘+nm+’ must contain a number between ‘+min+’ and ‘+max+’.\n’;
      } } } else if (test.charAt(0) == ‘R’) errors += ‘- ‘+nm+’ is required.\n’; }
    } if (errors) alert(‘The following error(s) occurred:\n’+errors);
    document.MM_returnValue = (errors == ”);
} }

<body>
<form action=”abcd” method=”post”

onsubmit=”MM_validateForm(‘name’,”,’R’,’age’,”,’RinRange1:99′,’phone’,”,’NisNum’,’email’,”,’RisEmail’);return

document.MM_returnValue”>
<input name=”name” type=”text” id=”name” />
<input name=”age” type=”text” id=”age” />
 <input name=”sex” type=”radio” value=”male” />
<input name=”phone” type=”text” id=”phone” />
<input name=”email” type=”text” id=”email” />
<input name=”agree” type=”checkbox” id=”email” value=”” />
<input name=”Submit” type=”submit” />
</form>
</body>

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