function lib_bwcheck(){ //Browsercheck (needed)
        this.ver=navigator.appVersion; this.agent=navigator.userAgent
        this.dom=document.getElementById?1:0
        this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
        this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0;
        this.ie4=(document.all && !this.dom)?1:0;
        this.ie=this.ie4||this.ie5||this.ie6
        this.mac=this.agent.indexOf("Mac")>-1
        this.opera5=this.agent.indexOf("Opera 5")>-1
        this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0;
        this.ns4=(document.layers && !this.dom)?1:0;
        this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5 || this.dom)
        return this
}
var bw=new lib_bwcheck()

function isEmpty(inputVal) {
   inputStr = inputVal.length
   var contsps = 0    // contador de espacios en blanco
   for (var i = 0; i < inputStr ; i++) {
	  var oneChar = inputVal.charAt(i)
	  if (oneChar == " ") {
	    contsps = contsps + 1
	 }
}
if (contsps == inputStr) {
	return true
 }else {
        return false }
}
function popUpWindow (url, myWidth, myHeight, features) {
	if(window.screen){
		var myLeft = (screen.width - myWidth) / 2;
		var myTop = (screen.height - myHeight) / 2;
		features+=(features!='')?',':'';
		features+=',left='+myLeft+',top='+myTop;
	}
	features += ((features!='')?',':'')+'width='+myWidth+',height='+myHeight		
	window.open (url, 'window', features) ;		
}

function getForm (form) {
	var frm = document.all ? document.all(form) : document.getElementById (form) ;	
	return frm ;
}