上传预览图片
<img id=pic src=/upload/remotupload/20071010122325403.gif> <input type=file name=file><input type=button .src=file.value value=预览图片> <input type=button (file.value) value=图片地址> <input type=button value="清除file里字">=============================================================================== <html> <head> <meta http-equiv="Content-Type" c> <title>图片上传</title> <script> 
function viewmypic(mypic,imgfile) { 
function viewmypic(mypic,imgfile) 
if (imgfile.value){ 
mypic.src=imgfile.value; mypic.style.display=""; mypic.border=1; 
} 
} </script> </head> <body> <center> <form name="upmyimg" method="post" enctype="multipart/form-data" action="getyourpic/" > <input name="imgfile" type="file" id="imgfile" size="40" /> </form> <img name="showimg" id="showimg" src="" style="display:none;" alt="预览图片" /> </div> <div style="display:none"> </div> </center> </body> </html> ===================================================================textarea自适应文字行数<textarea rows=1 name=s1 cols=27 >