纯js文字波浪型显示特效代码

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纯js文字波浪型显示特效代码

2016-08-09 网页编程网 网页编程网

<script language="JavaScript">
function makeArray(n){
    this.length=n
    return this
}
function hexfromdec(num) {
    hex=new makeArray(1);
    var hexstring="";
    var shifthex=16;
    var temp1=num;
    for(x=1; x>=0; x--) {
        hex[x]=Math.round(temp1/shifthex - .5);
        hex[x-1]=temp1 - hex[x] * shifthex;
        temp1=hex[x-1];
        shifthex /= 16;
    }
    for (x=1; x>=0; x--) { hexstring+=getletter(hex[x]); }
    return (hexstring);
}
function getletter(num) {
    if (num < 10) { return num; }
    else {
    if (num == 10) { return "A" }
    if (num == 11) { return "B" }
    if (num == 12) { return "C" }
    if (num == 13) { return "D" }
    if (num == 14) { return "E" }
    if (num == 15) { return "F" }
    }
}
function rainbow(text){
   var color_d1;
   var allstring="";
   for(i=0;i<text.length;i=i+2){
      color_d1=255*Math.sin(i/(text.length/3));
      color_h1=hexfromdec(color_d1);
      allstring+="<FONT COLOR="+color_h1+"ff"+color_h1+">"+text.substring(i,i+2)+"</FONT>";
   }
   return allstring;
}
function sizefont(text){
   var color_d1;
   var allstring="";
   var flag=0;
   for(i=0,j=0;i<text.length;i=i+1){
      if (flag==0) {
          j++;
          if (j>=7) {
             flag=1;}}
      if (flag==1) {
          j=j-1;
          if (j<=0) {
          flag=0; }}
      allstring+="<FONT SIZE="+ j + ">" + text.substring(i,i+1) + "</FONT>";
   }
   return allstring;
}
document.write("<font size=5><CENTER>")
document.write("<BR><BR>")
document.write( sizefont("网页编程网，专注于网页特效及广告代码，供站长和js爱好者参考！"))
document.write("</CENTER></font>")
</script>

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