String.prototype.URLlimpia = function(){
	var tmp_this = this.toLowerCase();
	var arr_busca = "αινσϊρό".split("");
	var arr_reemplaza = "aeiounu".split("");
	for(var i=0; i<arr_busca.length; i++ ){
		tmp_this = tmp_this.replace(arr_busca[i],arr_reemplaza[i]);
	}
	tmp_this = tmp_this.replace(" ","_");	
	return tmp_this.replace(/[^\\s\w]/g,"_");
}