// JavaScript Document
function isEmail(val)
{
        // Return false if e-mail field does not contain a '@' and '.' .
        if (val.indexOf ('@',0) == -1 || val.indexOf ('.',0) == -1)
        {
                return 1;
        }
        else
        {
                return 0;
        }
}
function check_form() {
		var error_message ="The following errors occurred while processing this form:\n";
		var error = 0;		
		var y_name=document.email_friend_frm.y_name.value;		
		var y_email=document.email_friend_frm.y_email.value;
		var f_name=document.email_friend_frm.f_name.value;		
		var f_email=document.email_friend_frm.f_email.value;   	  
		var message_sent=document.email_friend_frm.message_sent.value;
		
	     
		// Validation for re-password
		if (y_name=="" || y_name<2) {
		 error_message = error_message + "Please enter your name \n";
		 error = 1;
		}
		
		
		if (y_email=="" || isEmail(y_email)) {
		 error_message = error_message + "Please enter your correct email address \n";
		 error = 1;
		}
		
		
		if(f_name=="" || f_name<2) {		
		 error_message = error_message + "Please enter your colleagues name \n";
		 error = 1;
		}
		
		
		if (f_email=="" || isEmail(f_email)) {
		 error_message = error_message + "Please enter your colleagues correct email address \n";
		 error = 1;
		}
		
				
		if (message_sent=="") {
		 error_message = error_message + "Please enter a message \n";
		 error = 1;
		}

		if (error == 1) {
		 alert(error_message);
		  return false;
		} else {
		  return true;
	    }
	} // end  function check_form() {