function validate_alert(form){
	var f = $(form);
	if(f.keywords.value == '' ){
		alert("Please enter Keywords.");
		f.keywords.focus();
		return false;
	}	 	 
	var st = email(f.email.value);
	if(!st){ 
		alert('Either email field is empty or this is not a valid email address.');  
		f.email.focus();
		return false;	
	} 	  	  	  	  	  	  	  	  	  	  	  	  	  	  	  	  	  
	else return true;
}