function setActiveStyleSheet(title) {
   var i, a, main;
   for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
     if(a.getAttribute("rel").indexOf("style") != -1
        && a.getAttribute("title")) {
       a.disabled = true;
       if(a.getAttribute("title") == title) a.disabled = false;
     }
   }
}


if ((screen.width==800) && (screen.height==600))
{
    setActiveStyleSheet("hoja2");
}
else
{
    setActiveStyleSheet("hoja1");
}



//** Dynamic Drive Equal Columns Height script v1.01 (Nov 2nd, 06)
//** http://www.dynamicdrive.com/style/blog/entry/css-equal-columns-height-script/

var ddequalcolumns=new Object()
//Input IDs (id attr) of columns to equalize. Script will check if each corresponding column actually exists:
ddequalcolumns.columnswatch=["barraIzquierda", "barraDerecha","contenido"]

ddequalcolumns.setHeights=function(reset){

var tallest=0
var resetit=(typeof reset=="string")? true : false

	for (var i=0; i<this.columnswatch.length; i++){
		if (document.getElementById(this.columnswatch[i])!=null) {
			if (resetit)
				document.getElementById(this.columnswatch[i]).style.height="auto"
			if (document.getElementById(this.columnswatch[i]).offsetHeight>tallest)
				tallest=document.getElementById(this.columnswatch[i]).offsetHeight
		}
	}

	if (tallest>0){
		for (var i=0; i<this.columnswatch.length; i++){
			if (document.getElementById(this.columnswatch[i])!=null)
				document.getElementById(this.columnswatch[i]).style.height=tallest+"px"
		}
	}	
	}

ddequalcolumns.resetHeights=function(){
	this.setHeights("reset")
}

ddequalcolumns.dotask=function(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload)
var tasktype=(window.addEventListener)? tasktype : "on"+tasktype
if (target.addEventListener)
target.addEventListener(tasktype, functionref, false)
else if (target.attachEvent)
target.attachEvent(tasktype, functionref)
}

ddequalcolumns.dotask(window, function(){ddequalcolumns.setHeights()}, "load")
ddequalcolumns.dotask(window, function(){if (typeof ddequalcolumns.timer!="undefined") clearTimeout(ddequalcolumns.timer); ddequalcolumns.timer=setTimeout("ddequalcolumns.resetHeights()", 200)}, "resize")