Hello all, Can someone help me with the following problem? I have a text field for date input. The text field already had --/--/---- in there. When user input 1, it should have something like 1-/--/---- . and the cursor should be next to 1. I used functions onkeyup/onkeydown and window.event.keycode to get the key from keyboard. var string = '--/--/----' var key = window.event.keyCode var num = key - 48 //convert to number 0-9 var index = string.indexOf('-') var curValue = getElementIdBy"txtDate"].value getElementIdBy["txtDate"].value= curValue.substring(0,index+1) + num + string.indexOf(10,index+1) The problem is that the cursor moved to the end of the string. I tried to set window.event.keyCode = 37 in the loop to move the arrow to the left. But it just moved only one time. Because the flags did not change. I have thought of toggling insert/overwritten key. by set window.event.keyCode=45, But it did not work. Thanks for any suggestion or comments