/*	Please do not duplicate this document with out prior permission.
	This unique combination of code, functions, and variable are copyright to glrrin. */

/*	Form Characters 
	Measures remaining Characters for input
	
	George Oommen (oommen.6@osu.edu)
	October 12 2007 */

var ns6 = document.getElementById&&!document.all

function restrictinput(maxlength,e,placeholder) {
	if (window.event&&event.srcElement.value.length >= maxlength)
		return false
	else if (e.target&&e.target == eval(placeholder)&&e.target.value.length >= maxlength) {
		var pressedkey = /[a-zA-Z0-9\.\,\/]/ //detect alphanumeric keys
		if (pressedkey.test(String.fromCharCode(e.which)))
			e.stopPropagation()
	}
}

function countlimit(maxlength,e,placeholder){
	var theform = eval(placeholder)
	var lengthleft = maxlength - theform.value.length
	var placeholderobj = document.all? document.all[placeholder] : document.getElementById(placeholder)
	if (window.event||e.target&&e.target == eval(placeholder)){
		if (lengthleft<0)
			theform.value = theform.value.substring(0,maxlength)
		placeholderobj.innerHTML = lengthleft
	}
}


function displaylimit(thename, theid, thelimit) {
	var theform = theid != "" ? document.getElementById(theid) : thename
	var limit_text = '<b><span id="'+theform.toString()+'">'+thelimit+'</span></b> characters remaining to input.'
	if (document.all||ns6)
		document.write(limit_text)
		if (document.all) {
		eval(theform).onkeypress=function() { return restrictinput(thelimit,event,theform) }
		eval(theform).onkeyup=function() { countlimit(thelimit,event,theform) }
		}
	else if (ns6) {
		document.body.addEventListener('keypress', function(event) { restrictinput(thelimit,event,theform) }, true); 
		document.body.addEventListener('keyup', function(event) { countlimit(thelimit,event,theform) }, true); 
	}
}