start square

function startsquare() {
var square = document.getElementById("atnbg20160717su_square")
stylesquare(square)


function stylesquare(square) {
var styles = document.createAttribute("style")
square.setAttributeNode(styles)
var v = "position:fixed;left:10%;top:10%;width:50%;height:50%"
styles.value = v}

}