function WindsPhotoResizeImage(objImage,maxWidth,maxHeight) {
try{
  if(maxWidth>0 && maxHeight>0){
   var objImg = $(objImage);
   var objImg = $(objImage);
   if(objImg.width()>maxWidth && objImg.width()>objImg.height() || objImg.height()==objImg.width()){
    objImg.width(maxWidth).css("cursor","pointer")
    objImg.height(objImg.height() / (objImg.width() / maxWidth)).css("cursor","pointer")
   }
  else if(objImg.height()>maxHeight && objImg.height()>objImg.width() || objImg.height()==objImg.width()){
    objImg.height(maxHeight).css("cursor","pointer")
    bjImg.width(objImg.width() / (objImg.height() / maxHeight)).css("cursor","pointer")
   }
  }
}catch(e){};
}

function CheckForm()
  {  
  if ((document.upload.file0.value.length == 0) && (document.upload.url.value.length == 0))  {  
  alert("一个也没填?!");
  document.upload.file1.focus();
  return false;
  }
  
  document.getElementById('upupup').value = '上传中...';
  document.getElementById('upupup').disabled=true;
  return true;  
}

var maxWidth=170;
var maxHeight=170;
var fileTypes=["jpg","gif","png","bmp","jpeg"];
var outImage="previewField";
var defaultPic="images/nopic.jpg";
var globalPic;

function preview(what){
		var source=what.value;
		var ext=source.substring(source.lastIndexOf(".")+1,source.length).toLowerCase();
		for (var i=0; i<fileTypes.length; i++) if (fileTypes[i]==ext) break;
		globalPic=new Image();
		if (i<fileTypes.length) globalPic.src=source;
		else {
			globalPic.src=defaultPic;
			what.outerHTML = what.outerHTML.replace(/value=\w/g,"");
			alert("图片格式限制: "+fileTypes.join(", "));
		}
		setTimeout("applyChanges()",200);
}

function applyChanges(){
		var field=document.getElementById(outImage);
		var x=parseInt(globalPic.width);
		var y=parseInt(globalPic.height);
		if (x>maxWidth) {
			y*=maxWidth/x;
			x=maxWidth;
		}
		if (y>maxHeight) {
			x*=maxHeight/y;
			y=maxHeight;
		}
		field.style.display=(x<1 || y<1)?"none":"";
		field.src=globalPic.src;
		field.width=x;
		field.height=y;
}

<!-- Author By Wilf.cn
function killErrors() {
return true;
}
window.onerror = killErrors;
// -->