Web and WebWorks Development

[onelord2002]

I'm writting an app that support both touch and trackball navigation.

so i'm using setFocus(elementId) where ever needed and it is working fine on touch emulators

but my client is using

BlackBerry 9530
Smartphone (3G, CDMA)
V4.7.0.148 (Platform 4.0.0.181)
BlackBerry 9530. V4.7.0.148 upgraded to  v5.0.0.328

where ever i'm calling setFocus() app stops working

so is there any way to check if the mobile support touch so that i can do something similar to this

if(isTouchEnabled){
   setFocus(elementId);
}

[onelord2002 · Accepted solution]

i solved it myself

read somewhere that resolutions are different for both touch and trackball enabled devices

so i used wikipedia and prepared list of all the resolutions of devices that support only touch

List_of_BlackBerry_products

the list is as follows

"360x480",
"480x640",
"480x800",
"640x480"

using this data i wrote a javascript as follows

//--- List of all resolutions that support touch ---
var touchSupportedResolutionList = [
                                    "360x480",
                                    "480x640",
                                    "480x800",
                                    "640x480"
                                    ];

// return true if the device is touch enabled else false
function isTouchEnabled(){
	var height = screen.height;
	var width = screen.width;
	var resolution = screen.width+"x"+screen.height;
	
	for(var i=0 ; i<touchSupportedResolutionList.length ; i++){
		if(touchSupportedResolutionList[i] == resolution)
			return true;
	}
	return false;
}