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1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 </head> 7 <script type="text/javascript"> 8 var flag=false; 9 function DrawImage(ImgD) { 10 var image=new Image(); 11 image.src=ImgD.src; 12 if(image.width>0 && image.height>0) { 13 flag=true; 14 if(image.width/image.height>= 120/80) { 15 if(image.width>120) { 16 ImgD.width=120; 17 ImgD.height=(image.height*120)/image.width; 18 } else { 19 ImgD.width=image.width; 20 ImgD.height=image.height; 21 } 22 ImgD.alt=image.width+"×"+image.height; 23 } else { 24 if(image.height>80) { 25 ImgD.height=80; 26 ImgD.width=(image.width*80)/image.height; 27 } else { 28 ImgD.width=image.width; 29 ImgD.height=image.height; 30 } 31 ImgD.alt=image.width+"×"+image.height; 32 } 33 } 34 /*else{ 35 ImgD.src=""; 36 ImgD.alt="" 37 }*/ 38 } 39 40 function FileChange(Value) { 41 flag=false; 42 document.all.uploadimage.width=10; 43 document.all.uploadimage.height=10; 44 document.all.uploadimage.alt=""; 45 document.all.uploadimage.src=Value; 46 } 47 48 function FileChange1(Value) { 49 flag=false; 50 document.all.uploadimage1.width=10; 51 document.all.uploadimage1.height=10; 52 document.all.uploadimage1.alt=""; 53 document.all.uploadimage1.src=Value; 54 } 55 56 function BeforeUpLoad() { 57 if(flag) 58 alert("OK"); 59 else 60 alert("FAIL"); 61 } 62 </script> 63 <body> 64 <IMG id="uploadimage" height=10 width=10 src="" 65 onload="javascript:DrawImage(this);" > 66 <input type="file" id="upload" onchange="javascript:FileChange(this.value);"/> 67 </body> 68 </html>
