function ShowImage(v)
    {
		var t_html;
		if (v != "") {
			t_html = "<img id=\"uploadImg"+ "\" src='" + v + "'  width='100' height='75' alt=''>";
		} else {
			t_html = "<img src='/webdoc/images/100x75.jpg' width='100' height='75' alt=''>";
		}
		document.getElementById("up1").innerHTML = t_html;
		vrifyPic("uploadFile1");
    }

	function s(t){
	  var tx = document.getElementById(t);
	  var x=tx.value;
	  x=x.toLowerCase();
	  //alert(x);
		if( x.indexOf(".jpg")<0	&& x.indexOf(".png")<0 && x.indexOf(".gif")<0 ) {
			alert("Please select a valid picture file !");
			removeImage();
			return false;
		}else{
			return true;
		}
	}

    var img=null;

	function vrifyPic(v)
	{
		if (!s(v)) return false;
		if((img!=null || img!=undefined) && img ) img.removeNode(true);
		img=document.createElement("img");
		img.style.position="absolute";
		img.style.visibility="hidden";
		img.attachEvent("onreadystatechange",orsc);
		img.attachEvent("onerror",oe);
		document.body.insertAdjacentElement("beforeend",img);
		var inp=document.getElementById(v);
		img.src=inp.value;
	}

	function orsc()
	{
		if(img.readyState!="complete")return false;
		if ( (img.fileSize) > (1024*200)){
			alert("Please upload picture less than 200k !");
			removeImage();
		}
	}

	function oe()
	{
		alert("Invalid,check the picture path or format!");
		return;
	}

	function removeImage() {
		var t_html;
		var t_fileUp;
		t_html = "<img src='/webdoc/images/100x75.jpg' width='100' height='75' alt='' id='img01' class='Img02' />";
		t_fileUp = "";
		t_fileUp = "<input id='uploadFile1' name='uploadFile1' type='file' class='Input02' onChange='javascript:ShowImage(this.value);' />&nbsp;";
		document.getElementById("uptmp1").innerHTML = t_fileUp;
		document.getElementById("up1").innerHTML = t_html;
	}
    //���)չ���Ƿ�Ϸ�,�Ϸ�����True
    function CheckExt(ext)
    {
    	//�������������)չ��
    	var AllowExt="jpg|gif|jpeg|png|bmp";
    	var ExtOK=false;
			var ArrayExt;
			if(AllowExt.indexOf('|')!=-1)
			{
				ArrayExt=AllowExt.split('|');
				for(i=0;i<ArrayExt.length;i++)
				{
					if(ext.toLowerCase()==ArrayExt[i])
					{
						ExtOK=true;
						break;
					}
				}
			}
			else
			{
				ArrayExt=AllowExt;
				if(ext.toLowerCase()==ArrayExt)
				{
					ExtOK=true;
				}
			}
			return ExtOK;
    }

	function checkSize(fileName){
		var sizeOK=false;
		var img=new Image();
		img.onerror = new Function("alert('�ļ������ڣ���Ŀ�����Ͳ�ƥ�䣡');");
		img.onreadystatechange = function (){
			if (img.readyState == "complete"){
		     if(img.fileSize<1024*200) sizeOK=true;
		     }
		  }
		  return sizeOK;
	}

 	function isBlank(param){
	  if(param == undefined || param.value==undefined ||trim(param.value)==""){
	    return true;
	   }
	   return false;
	}
	function trim(str){
			if(typeof str == "string") return str.replace(/(^\s*)|(\s*$)/g, "");
			else return str;
	}