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;
}
function searchPress(event, what, numDecimals) {
		var strValue; var el;
        if(what.id == null) return;

		var isIE = document.all ? true : false;
		var isNS = (navigator.appName.indexOf('Netscape') > -1) ? true : false;

		if(isIE){
			strValue = event.keyCode;
			el = event.srcElement;
		}
		if(isNS){
			strValue = event.which;
			el = event.target
		}
        var key = String.fromCharCode(strValue);
		if (strValue == 8 | strValue == 0) {
			return true;
        }
		var dot = false;
		var str = what.value;

		//Decimal check
		var dpos = str.lastIndexOf(".")
		if (dpos > 0) {
			var decimalnumbers = str.substring(dpos,str.length)
			if (decimalnumbers.length > numDecimals) {
				return false
			}
		}
		if(key == "." && numDecimals < 1) return false;

		if (str.indexOf(".") >= 0) {
			dot = true;
		}
		if (((key < '0' || key > '9') && key != ',' && (key != '.')) || (key == '.' && dot)) {
			return false;
		}else{
			if(key == "." && el.value.indexOf('.') >= 0){
					return false
			}
			return true
		}
		return true;
}