Help with form validation

[scohie]

I have used http://www.dynamicdrive.com/dynamici...uiredcheck.htm
to successfully validate parts of my form, just wondering if I could get some assistance in validating other functions such as valid email and is numeric?

Thanks

[thetestingsite]

For the email check, you could combine the script above with the following one:

http://www.dynamicdrive.com/dynamicindex16/emailvalidate.htm


As for the numbers, I believe there is a function call isNaN (is Not a Number). But not 100% on that.

Hope this helps.

[rajug]

Here is my email validation function:

function echeck(str) {
	var at = "@"
	var dot = "."
	var lat = str.indexOf(at)
	var lstr = str.length
	var ldot = str.indexOf(dot)
	
	if (str.indexOf(at) == -1){
	   alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		alert("Invalid E-mail ID")
		return false
	}
	 if (str.indexOf(at,(lat+1))!=-1){
		alert("Invalid E-mail ID")
		return false
	 }
	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		alert("Invalid E-mail ID")
		return false
	 }
	 if (str.indexOf(dot,(lat+2))==-1){
		alert("Invalid E-mail ID")
		return false
	 }
	 if (str.indexOf(" ")!=-1){
		alert("Invalid E-mail ID")
		return false
	 }
	 return true					
}

And for the numeric, as thetestingsite said, there is isNaN function in javascript:

if(isNaN(value)){
alert('string');
}else{
alert('numeric');
}