// JavaScript Document

   function validate(){
		var email = element("email_newsletter")
			   
		
		if(validateNull(email) == true){
			 if(IsEmail(email.value) == false){
					alert("Please enter a valid email Id")
					email.focus()
			 		return false
			 }
		}else{
			alert("Please enter a valid email Id")
			email.focus()
			 return false
			}
			if(email.value=="Your Email"){
			alert("Please enter a valid email Id")
			email.focus()
			return false
			}
		
		
				
	       document.getElementById("signup").action="http://d.searchinfluence.com/SIemailSystem/index.php?p=78&t=2" 
		   document.getElementById("signup").method="post"
		   document.getElementById("signup").submit();
		   return true
	}

      
   
	function validateNull(ele){
			if(ele.value == "" || ele.value == null){
				return false
			}
			else{
		    	return true
			}
	}
	
	function element(ele){
	  if(document.getElementById(ele) != "undefined")
	   {
	      return document.getElementById(ele)
	   }else{
		   
		   alert(ele + " element does not exists!")
	   }
	}
	
function IsEmail(expression) {
	if(/^[a-z0-9_\-]+(\.[_a-z0-9\-]+)*@([_a-z0-9\-]+\.)+([a-z]{2}|aero|arpa|biz|com|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|pro|travel)$/.test(expression)){
		return true;
	}else{
		return false;
	}
}
function clearForm() {
	if(document.signup.email_newsletter.value==document.signup.email_newsletter.defaultValue)document.signup.email_newsletter.value = "";
}
function signupclearForm() {
	if(document.signup.email_newsletter.value=="")document.signup.email_newsletter.value = "Your Email";
}