function buildURL() 
 {
 
 var type_index  = document.select_range.type.selectedIndex;
 var type  = document.select_range.type.options[ type_index ].value;
 var range_index = document.select_range.range.selectedIndex;
 var range = document.select_range.range.options[ range_index ].value;
 var day;
 if (range == "none" || type == "none"){
 
 	alert("Please select a range AND location")
 		}
		else{
 			if (range == "90day"){
 			day='90.gif'}
 			if (range == "120day"){
 			day='120.gif'}
 			if (range == "150day"){
 			day='150.gif'}
 			if (range == "180day"){
 			day='180.gif'}
 			if (range == "210day"){
 			day='210.gif'}
 			if (range == "240day"){
 			day='240.gif'}
 			if (range == "270day"){
 			day='270.gif'}
 			if (range == "300day"){
 			day='300.gif'}
 			if (range == "330day"){
 			day='330.gif'}
 			if (range == "365day"){
 			day='365.gif'}
			if (type == "base"){	
 			var ext='.html';
			window.location = 'http://pa.water.usgs.gov/monitor/precip/' + range + ext ;
			}
			else{var url = 'http://pa.water.usgs.gov/monitor/precip/' + range + '/' + type + day ;
 			window.location = (url);
			}
			}
 
 return (false);
 }  
 
 
 function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}