<script type="text/JavaScript">
			<!--
			function MM_openBrWindow(theURL,winName,features) { //v2.0
			  window.open(theURL,winName,features);
			}
			//-->

			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.selectedindex2==0)) {
			pass=false;
			break;
			         }
			      }
			   }
			}
			if (!pass) {
			shortFieldName=tempobj.name.substring(8,30).toUpperCase();
			alert("Porfavor asegurese que el campo "+shortFieldName+" este correctamente ingresado.");
			return false;
			}
			else
			return true;
			}
        </script>