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file size from javascript

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Get file size from javascript code

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Copy this code and paste it in your HTML 
  1. function validateFileSize(component,maxSize,msg){
  2. 		if(navigator.appName=="Microsoft Internet Explorer"){
  3. 			if(component.value){
  4. 				var myFSO 		= 	new ActiveXObject("Scripting.FileSystemObject");
  5. 				var filepath 	= 	component.value;
  6. 				var thefile 	= 	myFSO.getFile(filepath);
  7. 				var size 		= 	thefile.size;
  8. 			} 
  9. 		} else {
  10. 			if(component.files[0]!=''){
  11. 				size		=	component.files[0].size;
  12. 			} 
  13. 		}
  14. 		if(size!='' && size>maxSize){
  15. 			jAlert('Upload file size should be less than 25MB.','document.theform.uploadbroucher','uploadbroucher');
  16. 			document.getElementById('uploadbroucher').value="";
  17. 			return false;
  18. 		} else {
  19. 			return true;
  20. 		}
  21. 	}
  22.  
  23.  
  24. component - document.getElementById('filed')

URL: http://deepeshdarshan.wordpress.com/2012/06/20/how-to-validate-upload-file-size-and-file-extension-using-javascript/

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