高手请进：javascript控制图片的问题 在限制情况下如何保持图片品质不变

Question

这个问题我回过几次了.
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Answer 1

把你上面的函数换成下面我这个:
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>=  125/115){  
         if(image.width>125){      
         ImgD.width=125;  
         ImgD.height=(image.height*125)/image.width;  
         }else{  
         ImgD.width=image.width;      
         ImgD.height=image.height;  
         }  
         ImgD.alt=image.width+"×"+image.height;  
         }  
       else{  
         if(image.height>115){      
         ImgD.height=115;  
         ImgD.width=(image.width*115)/image.height;            
         }else{  
         ImgD.width=image.width;      
         ImgD.height=image.height;  
         }  
         ImgD.alt=image.width+"×"+image.height;  
         }  
       }  
}