JavaScript setting values

JavaScript setting values

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In the situation of a combination box populated by JavaScript, when a dropdown list is selected, retrieving the value can be problematical. The solution is to trap the click within JavaScript and output the value to a textbox.

However, this textbox cannot be hidden by setting visible to false, as it will then not be rendered. The solution is make the textbox invisible by setting the border to none, the backcolor to transparent and the forecolor to the same as the form background.

Code: 

function DoActivity3() {
var theform = document.Form1;
var iSeek = 0;
var cboActivity3 = theform.cboActivity3;
  i = cboActivity3.selectedIndex;
  iSeek = cboActivity3.options[i].value;
  theform.txtActivityId3.value = iSeek;
}

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This was first published in April 2003

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