Error : Not Implemented Code 0

I keep getting this error in IE6 and 7 version s. The script is :

window.onload = checkBrowserVersion("Explorer","7");

That function is defined previously and I get this as not i开发者_StackOverflowmplemented

You are executing the function not assigning it as a handler to the onload event of window. Remove the parentheses or wrap the function call within another function.