// JavaScript Document
function checkForm(){
   var stype;
   var stypes=document.form1.stype;
   var words=document.form1.s;
   for(i=0;i<stypes.length;i++){
	 if(stypes[i].checked){
		stype= stypes[i].value;
		 }
	   }
   if(words.length>100){
      alert("您输入的关键词太长了！");
	  return false;
   }
   if(words.value == ""  || words.value.substring(0,6) =="请输入关键词") {
	  alert("请输入关键词！");
	  return false;
	}
   if(stype==1){
      document.form1.action="http://www.semcase.com/blog/";
   }
   if(stype==2){
	   window.location.href="http://www.semcase.com/news/search.php?keyword="+words.value;
	   return false;
   }
   if(stype==3){
	   window.location.href="http://www.semcase.com/forums/search.php?srchtxt="+words.value+"&srchuname=&srchtype=title&srchfilter=all&srchfrom=0&orderby=lastpost&ascdesc=desc&srchfid=all&searchsubmit=yes";
	   return false;
   }   
}