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function cargarScript(sRutaScript,callback){
	var elemScript=document.createElement("script");
	elemScript.type="text/javascript";
	if( elemScript.readyState ){
		elemScript.onreadystatechange=function(){
			if( elemScript.reareadyState === "loaded" || elemScript.reareadyState === "complete"){
				elemScript.onreadystatechange=null;
				callback();
			}
		}
	}else{
		elemScript.onload=function(){
			callback()
		}
	}
	elemScript.src=rutaScript;
	document.getElementsByTagName("head")[0].appendChild(elemScript);
}