// JavaScript Document
	function echeck(str) {

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

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert(message)
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert(message)
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert(message)
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert(message)
		    return false
		 }

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

 		 return true					
	}


		function numbersonly(myfield, e, dec)	{
			var key;
			var keychar;
			if (window.event)
				key = window.event.keyCode;
			else if (e)
				key = e.which;
			else
				return true;
			keychar = String.fromCharCode(key);
		
			// control keys
			if ((key==null) || (key==0) || (key==8) || (key==9) || (key==13) || (key==27) )
				return true;
			// numbers
			else if ((("0123456789").indexOf(keychar) > -1))
				return true;
			// decimal point jump
			else if (dec && (keychar == "."))
			{
				myfield.form.elements[dec].focus();
				return false;
			}
			else	{
				return false;
			}
		
		
		}

	var isNN = (navigator.appName.indexOf("Netscape")!=-1);
	
	function autoTab(input,len, e) {
		var keyCode = (isNN) ? e.which : e.keyCode; 
		var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
		if(input.value.length >= len && !containsElement(filter,keyCode)) {
			input.value = input.value.slice(0, len);
		input.form[(getIndex(input)+1) % input.form.length].focus();
	}
	
	function containsElement(arr, ele) {
		var found = false, index = 0;
		while(!found && index < arr.length)
		if(arr[index] == ele)
			found = true;
		else
			index++;
		
		return found;
	}

	function getIndex(input) {
		var index = -1, i = 0, found = false;
		while (i < input.form.length && index == -1)
		if (input.form[i] == input)index = i;
			else i++;
			return index;
		}
		return true;
	}