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javascript onclick button won't work on single click

I can't get a javascript to call a function on one click. I would have to click the button several times in order for it to execute. here is what I have tried so far:

<a href="javascript:delete_todo(4);void(0)"><img border="0" align="absmiddle" src="b_x.gif"></a>

<a href="javascript:delete_todo(4)"><img border="0" align="absmiddle" src="b_x.gif"></a>

<a href="javascript:void(0);" onclick="javascript:delete_todo(4)"><img border="0" align="absmiddle" src="b_x.gif"></a>

<a onclick="javascript:delete_todo(4)"><img border="0" align="absmiddle" src="b_x.gif"></a>

The code is added by another javascript function that adds the line of code to a table td using .innerHTML

Has anyone had this problem and found a solution?

Event handlers should always be in the onclick. Using javascript: is bad form.

<a href="#" onclick="delete_todo(4);return false;">...</a>

Hmm... Try to remove javascript: in onClick atribute. Here is working example in jsFiddle: http://jsfiddle.net/ep7R9/

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