The foreground call is as follows
| The code is as follows |
Copy Code |
| onclientclick= "Return Fuccheckjpgandgif" (Form1. File1.value); " |
--where File1 is the upload file control
Function code:
| The code is as follows |
Copy Code |
| Function Fuccheckjpgandgif (strfilename) {
if (strFileName!= "") {
var strtype = strfilename.substring (strfilename.length-4, strfilename.length);
strtype = Strtype.tolowercase ();
if ((strtype = ". jpg") | | (Strtype = = ". gif") | | (strtype = = "jpeg") | | (Strtype = = ". bmp")) {
return true;
}
else {
alert ("Please upload a picture in jpg, GIF or BMP format, thank you!") ");
return false;
}
}
alert ("Please upload a picture in jpg, GIF, or BMP format, thank you!") ");
return false; } |
Below put a compatibility super other upload file picture type verification
| The code is as follows |
Copy Code |
| <script> Uploadfilecheck=function ()
{
This. allowext= ". Jpg,.gif";//Allow upload of file type 0 for unrestricted each extension must be added with a "," lowercase letter
This. allowimgfilesize=0;//allowed to upload files of size 0 to unlimited units: KB
This. allowimgwidth=0;//allowed to upload a picture with a width of 0 of unlimited units: px (pixel)
This. allowimgheight=0;//allowed to upload a picture of the height of 0 is an unrestricted unit: PX (pixel)
This. Imgobj=new Image ();
This. imgfilesize=0;
This. imgwidth=0;
This. imgheight=0;
This. Fileext= "";
This. Errmsg= "";
This. isimg=false;//Global Variables
}
Uploadfilecheck.prototype.checkext=function (obj)
{
This. Errmsg= "";
This. Imgobj.src=obj.value;
This. Haschecked=false;
if (obj.value== "")
{
This. errmsg= "N Please select a file";
}
Else
{
This. Fileext=obj.value.substr (Obj.value.lastIndexOf (".")). toLowerCase ();
if (this. Allowext!=0&&this. Allowext.indexof (this. Fileext)//To determine whether the file type is allowed to be uploaded or not ==-1
{
This. errmsg= "n This file type is not allowed to upload. Please upload "+this." allowext+ "Type of file, the current file type is +this. Fileext;
}
}
if (this. Errmsg!= "")
{
This. ShowMsg (this. Errmsg,false);
return false;
}
Else
return this. Checkproperty (obj);
}
Uploadfilecheck.prototype.checkproperty=function (obj)
{
while (this. imgobj.readystate!= "complete")//
{
Sleep (1000);//One second use diagram to fully load
}
if (this. Isimg==true)
{
This. Imgwidth=this. imgobj.width;//get the width of the picture
This. Imgheight=this. imgobj.height;//get the height of the picture
if (this. Allowimgwidth!=0&&this. Allowimgwidth<this. ImgWidth)
This. Errmsg=this. errmsg+ "n picture width exceeds limit. Please upload width less than "+this." allowimgwidth+ "px file, the current picture width is" +this. imgwidth+ "px";
if (this. Allowimgheight!=0&&this. Allowimgheight<this. ImgHeight)
This. Errmsg=this. errmsg+ "n picture height exceeds limit. Please upload height less than "+this." allowimgheight+ "px file, the current picture height is" +this. imgheight+ "px";
}
This. Imgfilesize=math.round (this. IMGOBJ.FILESIZE/1024*100)/100;//Get the size of the picture file
Alert (this. Imgfilesize);
if (this. Allowimgfilesize!=0&&this. Allowimgfilesize<this. Imgfilesize)
This. Errmsg=this. errmsg+ "n file size exceeds limit. Please upload less than "+this." Allowimgfilesize+ "KB file with the current file size of +this. Imgfilesize+ "KB";
if (this. Errmsg!= "")
{
This. ShowMsg (this. Errmsg,false);
return false;
}
Else
return true;
}
Uploadfilecheck.prototype.showmsg=function (MSG,TF)//display hint information tf=false display error message msg-information content
{
/*msg=msg.replace ("n", "<li>");
Msg=msg.replace (/n/gi, "<li>");
*/
Alert (msg);
}
function sleep (num)
{
var tempdate=new Date ();
var tempstr= "";
var thexmlhttp = new ActiveXObject ("Microsoft.XMLHTTP");
while (new Date ()-tempdate) <num)
{
tempstr+= "n" + (new Date ()-tempdate);
try{
Thexmlhttp. Open ("Get", "About:blank?") Jk= "+math.random (), false);
Thexmlhttp. Send ();
}
catch (e) {;}
}
CONTAINERDIV.INNERTEXT=TEMPSTR;
Return
} function C (obj)
{
var d=new uploadfilecheck ();
D.isimg=true;
d.allowimgfilesize=20;
D.checkext (obj)
}
</script> <body>
<input name= "" type= "file" onchange= "C (this)"/> </body>
|
