how we can change the height of Select html (dropdown combobox ) in the client side javascript dynamically

i have  text box  where i will be typeing the some name , depening on  text the select html (dropdown)  i will be  loaded with values from database now  my problem is how to change the height of select depending on no of matchs if one value returned dropdown height should be adjusted. if 5 values are returned height should be adjusted. i want dynamic height of drop down , i have select

<select id="ddlSelect" multiple ="multiple" name="ddlSelect" style = "left: 136px; position: relative;top: 171px;Width: 212px;" visible ="false" >


var hgt = count * 50;

var hgt1 = hgt+"px";var sel = document.getElementById("ddlSelect"); = hgt1;

// = hgt1 ;

for(var i = 0 ; i < count ; i++)



var optn = document.createElement("OPTION");

optn.text = data[i];

optn.value = data[i];




but height is not changeing plz give suggstion

8/27/2007 10:58:58 AM 24353 articles. 2 followers. Follow

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hi are u trying auto filling box(just like Gmail,Yahoo ToID textbox).instead of this. = hgt1;


8/27/2007 11:41:24 AM

First remove any height attribute from your style attribute, and then in set the size property to the number of elements to be shown in that listbox. But keep one thing in your mind, you can change the height of listbox using this way but dropdown will always display only one item.
Zafar Iqbal
VP Technology

** Please mark as ANSWER if my reply helped you
8/27/2007 12:09:29 PM

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