// JavaScript Document
//用法<img src="samplephoto/index/" onload="photosize(this,120,90)">
function photosize(mypic,ww,hh){ 
    	
	var w=ww;
    var h=hh;
    var s=mypic.src;
		
    var img = new Image(); 
    img.src = s;//缓冲原来数据，避免原始数据在处理过程中被改变
		
    var width = img.width; 
    var height = img.height;  
		
    var A=w/width; 
    var B=h/height; 
			
    if(width>w||height>h)
        { if(A<B){
            mypic.width=w; 
            mypic.height=height*A; 
          }else{mypic.width=width*B;
                 mypic.height=h; 
               } 
    }else{mypic.width=width;
          mypic.height=height;}
	  
		  
}