block1.style.setExpression("left","0");
block1.style.setExpression("top","0");
block2.style.setExpression("left","document.body.clientWidth-200");
block2.style.setExpression("top","0");
block3.style.setExpression("left","0");
block3.style.setExpression("top","document.body.clientHeight-100");
block4.style.setExpression("left","document.body.clientWidth-200");
block4.style.setExpression("top","document.body.clientHeight-100");


block5.style.setExpression("left","300");
block5.style.setExpression("top","200");