/*
Many scripts more are available free online at
The JavaScript Source!! http://javascript.internet.com
*/

/*
Selects the first field of a form when the page loads.
Call this as an "onload" in the body of the page.
Syntax:  onload="preSelect()"
*/
function preSelect ()  {
	if (document.forms.length > 0)  {
		var field = document.forms[0];
		for (i = 0; i < field.length; i++)  {
			if ((field.elements[i].type == "text") || (field.elements[i].type == "textarea") || (field.elements[i].type.toString().charAt(0) == "s"))  {
				document.forms[0].elements[i].focus();
				break;
			}
		}
	}
}

/*
This routine AUTO-TABS to the next form field once the 
maxlength has been typed by the user.
Syntax: <input onKeyUp="return autoTab(this, 4, event);" size="5" maxlength="4">
*/
var isNN = (navigator.appName.indexOf("Netscape")!=-1);
function autoTab(input,len, e) {
	/*
	Original:  Cyanide_7 (leo7278@hotmail.com)
	Web Site:  http://members.xoom.com/cyanide_7
	*/
	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;
}

function checkCR(evt) {
	var evt  = (evt) ? evt : ((event) ? event : null);
	var node = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null);
	if (((evt.keyCode == 13) || (evt.keyCode == 3)) && (node.type=="text")) {
		return false;
	}
}

function isNotEmpty(elem,errorMsg)  {
	var str = elem.value;
	if(str == null || str.length == 0) {
		alert(errorMsg);
		return false;
	} else {
		return true;
	}
}
function isNotEmptyStr(str,errorMsg)  {
	if(str == null || str.length == 0) {
		alert(errorMsg);
		return false;
	} else {
		return true;
	}
}