javascript form validation

[junaidali15]

var b=document.forms["form1"]["CorporateSignonUserName"].value;
if (b==null || b=="")
{
alert("Please, Enter correct User ID.");
return false;
}
me yeh use kar k check kr rha hu k mere form ka value box empty submit na ho..
and me yeh bhi check karna chahta hu k us me koi bhi space na ho tau me b== k agay kya dalun jis se yeh check hojaye?

[The Genius]

Junaid Try this code.

Hope this will help.

var b=document.forms["form1"]["CorporateSignonUserName"].value;
var pat = /\s/g;

if (b == "" || pat.test(b)){

alert("Please, Enter correct User ID.");

}