textbox.width=t extbox.width*0. 85 Text Resize Control Help

6 New Member

I am trying to develop a resize module i can include on my pages that calculates the size of input fields based on the screen resolution...
I can already detect the screen resolution, and i have the width / height multiplier for every resolution i need to support... my problem is this...

I want the include file to be totally universal so heres my plan
I will use CSS styles to set the current text box size... i want the javascript to then detect the screen size and apply the correct multiplier to the textbox size...

Where i run into issues is getting the current textbox size and adding it to itself, it seems i cannot use the current textbox size because the javascript is loading before the text boxes themselves...

I am triggering this java on the BODY ONLOAD event....

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frmMain.txtLogin.style.width=frmMain.txtLogin.style.width*intWidthMultiplier

the input box would be coded like this

[HTML]<input type=text name=txtLogin style="height:2 0; width:200; font-size:12" />
[/HTML]

Thanks in advance for any help you can add.

Nov 30 '07 #1

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Recognized Expert Moderator Expert

hi ...

welcome to TSDN ...

in case you call the script onload the textbox is ready to use and to be manipulated ...

but i think you have to add units to the width-value ...

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text_box_reference.style.width = your_width + 'px';

note: the retrieved value should have that unit already, so you have to strip the value out of that before using math-operations :)

kind regards

ps: you should add the units too in the elements style-declaration ...

Nov 30 '07 #2

DeanJo

New Member

Im not familiar with units i will have to research these, i am executing the java function on Body Onload, when i try to use this code

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frmMain.txtLogin.style.width=frmMain.txtLogin.style.width*intWidthMultiplier

then it errors stating "Invalid arguement"

Dec 1 '07 #3

gits

5,390

Recognized Expert Moderator Expert

hi ...

have a look at the following example:

[HTML]<script type="text/javascript">
function resize_tb(tb_id ) {
var tb = document.getEle mentById('my_tb ');
tb.style.width = tb.style.width. replace(/px$/, '') * 2 + 'px';
}
</script>
<body onload="resize_ tb('my_tb');">
<input style="width:40 0px" type="text" id="my_tb" name="test" value="test"/>
</body>
[/HTML]
the invalid arg error should come from another line of your code since the one you posted has no arguments?

kind regards

Dec 1 '07 #4

DeanJo

New Member

for(i=0; i<document.frmM ain.elements.le ngth; i++)
{
if(document.frm Main.elements[i].type=="text")
{
document.frmMai n.elements[i].style.width=do cument.frmMain. elements[i].style.width * intWidthMultipl ier;
}
}
}

I continue to get invalid arguement with this.....
The error is pointing to this line
document.frmMai n.elements[i].style.width=do cument.frmMain. elements[i].style.width * intWidthMultipl ier

the variable intWidthMultipl ier during my tests has a value of 0.050

Dec 3 '07 #5

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