function returnObjById( id )
{
    if (document.getElementById)
        var returnVar = document.getElementById(id);
    else if (document.all)
        var returnVar = document.all[id];
    else if (document.layers)
        var returnVar = document.layers[id];
    return returnVar;
}

function CheckValue(leInput, OriginalVal) {
if (leInput.value==OriginalVal) { leInput.value=""; }
}

function CheckEmpValue(leInput, OriginalVal) {
if (leInput.value=="") { leInput.value=OriginalVal; }
}

function isEmpty(field) {
if(field.value == "" || field.value == null)
return true;
else return false;
}

function isNumber(field) {
   var iChars = "0123456789";
   for (var i = 0; i < field.value.length; i++) {
   
        if (iChars.indexOf(field.value.charAt(i))=="-1"){
        return false;
		 }
   }
   return true;
}