function doSearch(){
 	words=document.searchforit.query.value;
  	searchitems ="";
    index=document.searchforit.service.selectedIndex;

	for(var t=1;t<=words.length;t++)
    {
		if( words.substring(t-1,t)==" ")
				{
					if(index==1)searchitems+="+";
					else searchitems+="%20";
				}
		else{if(words.substring(t-1,t)=="+")searchitems+="%2B";
	   		 else searchitems+=words.substring(t-1,t);}}
   site=document.searchforit.service.options[index].value;
   site+=searchitems;
   if(document.searchforit.service.options[index].value=="")
   {
   	  alert("\nElige buscador!\n");
      document.searchforit.service.focus();
   } else if(searchitems=="" || searchitems==null) 
   {
   	  alert("\n¿Que buscas?\n");
      document.searchforit.query.focus();
   }
   else venster=window.open(site,"zoek");
  }