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function checkPic(picForm){
var location=picForm.pic.value;
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if(location==""){
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}
var point = location.lastIndexOf(".");
var type = location.substr(point);
if(type==".jpg"||type==".gif"||type==".JPG"||type==".GIF"){  //¿ØÖÆÊäÈëµÄͼƬ¸ñʽ
  img=document.createElement("img");
  img.src=location;
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  if(img.fileSize>imgMaxSize){
  alert("ͼƬ³ß´çÇë²»Òª´óÓÚ2M");
  return false;
  }else
    return true;
}
else{
  alert("Ö»ÄÜÊäÈëjpg»òÕßgif¸ñʽµÄͼƬ");
  return false;
}
return false;

}
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window.onload=function(){
var a = document.getElementsByTagName("a");
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