//定義"改變顏色"的函數(shù)
function?a(){
????var?a1=document.getElementById("txt");
????a1.style.color="red";
}

//定義"改變寬高"的函數(shù)
function?b(){
????var?b1=document.getElementById("txt");
????b1.style.width="300px";
???b1.style.height="200px";
}

//定義"隱藏內(nèi)容"的函數(shù)
function?c(){
????var?c1=document.getElementById("txt");
????c1.style.display="none";
}

//定義"顯示內(nèi)容"的函數(shù)

function?d(){
????var?d1=document.getElementById("txt");
????d1.style.display="block";}?
//定義"取消設(shè)置"的函數(shù)
function?e(){
????var?x=confirm("是否恢復(fù)設(shè)置？");
????if(x==true){

??????var?e1=document.getElementById("txt");
??????e1.removeAttribute('style');
}
else{
????
}
}