<!--
function checkrequired(which) {
	var pass=true
	if (document.images) {
		for (i=0;i<which.length;i++) {
			var tempobj=which.elements[i]
			if (tempobj.name.substring(0,8)=="required"){
				if (((tempobj.type=="text"||tempobj.type=="textarea")&&tempobj.value=='')) {
					pass=false
					break
				}
			}
		}
	}
	if (!pass) {
		alert("ĄNo has ingresado criterios válidos!")
		return false
	} else {
		return true
	}
}
//-->