function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
}

function validateFormInsert(){

	if (document.getElementById("date_title").value < '0'){
		alert ("Date Title is a required field");
		return false;
	}

	if (document.getElementById("pass").value < '0'){
		alert ("Password is a required field");
		return false;
	}

	return true;

}

function validateFormDelete(){

	if (document.getElementById("event_id").value < '0'){
		alert ("Event ID is a required field");
		return false;
	}

	if (document.getElementById("pass").value < '0'){
		alert ("Password is a required field");
		return false;
	}

	return true;

}

function validateFormContact(){

	if (document.getElementById("name").value < '0'){
		alert ("Name is a required field");
		return false;
	}

	if (document.getElementById("email").value < '0'){
		alert ("E-mail is a required field");
		return false;
	}
	
	if (document.getElementById("email").value > '0'){
		if (echeck(document.getElementById("email").value) == false){
			return false;
		}
	}
	
	if (document.getElementById("comments").value < '0'){
		alert ("Comments is a required field");
		return false;
	}

	return true;

}