第一种方法
<script language="javascript" type="text/javascript" >
function DrawImage(ImgD,width,height){
var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0){
if(image.width/image.height>= width/height){
if(image.width>width){
ImgD.width=width;
ImgD.height=(image.height*width)/image.width;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
}
else{
if(image.height>height){
ImgD.height=height;
ImgD.width=(image.width*height)/image.height;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
}
}
}
</script>
onload="DrawImage(this,300,300)"
第二种方法:
<script language="JavaScript">
<!--
var flag=false;
function DrawImage(ImgD){
var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>= 140/140){
if(image.width>140){
ImgD.width=140;
ImgD.height=(image.height*140)/image.width;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
ImgD.alt="点击查看详细信息...";
}
else{
if(image.height>140){
ImgD.height=140;
ImgD.width=(image.width*140)/image.height;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
ImgD.alt="点击查看详细信息...";
}
}
}
//-->
</script>
onload="javascript:DrawImage(this);