function isNumeric(val) {
	var dp = false;
	for (var i=0; i < val.length; i++) {
		if (!isDigit(val.charAt(i))) { 
			if (val.charAt(i) == '.') {
				if (dp == true) { return false; }
				else { dp = true; }
			}
			else {
				return false; 
			}
		}
	}
	return true;
}

function isDigit(num) {
	var string="1234567890";
	if (string.indexOf(num) != -1) {
		return true;
	}
	return false;
}

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("Please Enter A Valid E-mail Address")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Please Enter A Valid E-mail Address")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		   alert("Please Enter A Valid E-mail Address")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		   alert("Please Enter A Valid E-mail Address")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		   alert("Please Enter A Valid E-mail Address")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		   alert("Please Enter A Valid E-mail Address")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		   alert("Please Enter A Valid E-mail Address")
		    return false
		 }

 		 return true					
	}