function validate_login(){ 
	var userTxtBoxObj  = new getObj('username');
	var passTxtBoxObj  = new getObj('password');
	if(!emailCheck(userTxtBoxObj.obj.value) || userTxtBoxObj.obj.value == 'UserEmail'  || userTxtBoxObj.obj.value == ''){
		//alert('Please enter valid User Email.');
		userTxtBoxObj.obj.value='UserEmail';
		userTxtBoxObj.obj.focus();
		return false;
	}
	
	if(passTxtBoxObj.obj.value == '')  {
		alert('Please Enter Password.');
		//passTxtBoxObj.obj.value='Password';
		passTxtBoxObj.obj.focus();
		return false;
	}
	else if(!isAlphaNumeric(passTxtBoxObj.obj.value)  || passTxtBoxObj.obj.value == 'Password'  ){
		alert('Only alphanumeric password is allowed.');
		passTxtBoxObj.obj.value='Password';
		passTxtBoxObj.obj.focus();
		return false;
	}
	
	return true;
}