Hi Chris,
Thank you for your interest in Syncfusion Products.
You can change the text of the Upload Button from the "Uploadbox" control by using the below javascript code:
[javascript]
function test()
{
var uploadbox=document.getElementById('sbtn_UploadBox1');
uploadbox.value="Modified text";
}
Please refer the sample in the below link which illustrates the above:
http://www.syncfusion.com/support/user/uploads/Tools_Asp_UploadText_23769e15.zipPlease try this and let me know if this helps.
Thanks,
Melba