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=='')||(tempobj.type.toString().charAt(0)=="s"&&
			tempobj.selectedIndex==0)) {
				pass=false;
				break;
			}
		}
	}
}
if (!pass) {
	shortFieldName=tempobj.name.substring(8,30).toUpperCase();
	alert("O campo "+shortFieldName+" deve ser preenchido.");
	return false;
} 
else
return true;
}
//  End -->