var blocks = ["descr","examples","reference","send"]
var colorOn = "white"
var colorOff = "#ddd"

//  hide all blocks
function hideBlocks() {
    for (var i=0;i<blocks.length;i++) {
    	var blk = document.getElementById(blocks[i])
    	if (blk) {
			//  hide block
			blk.style.display = "none"
			//  dim text
			var el = document.getElementById("a"+i)
			el.className = ""
			//  fix positioning of tabs
/*
			if (i > 0)
				el.style.marginLeft = "-1px"
*/
		}
    }
}

//  display specific block
function show(i) {
	//  hide all blocks
	hideBlocks()
	//  display specific block
	document.getElementById(blocks[i]).style.display = "block"
	//  highlight tab text
	var el = document.getElementById("a"+i)
	el.className = "prodTabsCur"
}