function validate(pageName)
	{
		switch(pageName)
		{
		    case "login_login":
		        document.getElementById('emailLabel').className = 'formLabel';
		        document.getElementById('passwordLabel').className = 'formLabel';

		        if (document.testform.txtEmail.value.replace(/^\s*/, '').replace(/\s*$/, '') == "") {
		            alert('Please enter your User Name');
		            document.getElementById('emailLabel').className = 'formMandatory';
		            document.testform.txtEmail.focus();
		            return false
		        }
		        else {
		            if (!checkEmail(document.testform.txtEmail)) {
		                alert('Please enter a valid User Name.');
		                document.getElementById('emailLabel').className = 'formMandatory';
		                document.testform.txtEmail.select();
		                return false;
		            }
		            else {
		                return true;
		            }
		        }
		        break;
			default :
				// do nothing	
		}
		
		return true
	}
	
	  
	 
	function checkEmail(obj)
	{
		if (obj.value == null || obj.value == "") { 
			return true; 
		} 
		var em = obj.value
		var re = new RegExp();
		re = /.+@.+\..+/
		if (em != "") 
		{
			if (!(re.test(em))) 
			{
				return false;
			}
			return true;
			}
	}