function preloadimages(imagesstring){
 var imagesarray;
 var count;
 imagesarray=imagesstring.split("images/divide.gif","http","images/company.gif","http","images/product.gif","http","images/techdata.gif","http","images/contact.gif","http","images/job.gif","http","images/stock.gif","images/yilai.gif","images/company-over.gif","images/product-over.gif","images/techdata-over.gif","images/contact-over.gif","images/job-over.gif","images/stock-over.gif","images/logo_s.gif");
 for(count=0;count<imagesarray.length;count++){
  newimage=new Image();
  newimage.src=imagesarray[count];
 }
}