在警报中，单击“确定”转到下一页，单击“取消”必须使用javascript转到上一页

Question

I need to have a message to be alerted as follows :

If the user clicks on ok button aka accept button the page should be redirected to next page and if the user clicks on go/back button it should redirect to the previous page, Can someone suggest anything on this matter thanks.

At present i need to alert following meesage :

if(total < total1){
    alert('Total Grants & Others Spending should be LESS THAN Total State Tourism Office Spend Funding')
    return false;
}

Answer 1

if (confirm("something")) return true;
else {
  history.back();
  return false;
}

assuming a link wired up on click:

window.onload=function() {
  document.getElementById("accept").onclick=function() {
    var total = ..., total1=...;
    if (total < total1) {
      if (confirm('Total Grants & Others Spending should be LESS THAN Total State Tourism Office Spend Funding. Continue anyway?')) {
        return true; 
      }
      else { 
        history.back(); 
        return false;
      }
    }
    return true; // total was ok
  }
}

using

<a href="nextpage.html" id="accept">Accept</a>

Answer 2

You're looking for confirm() , not alert()

if(total < total1) {
    var redirect = confirm('Total Grants & Others Spending should be LESS THAN Total State Tourism Office Spend Funding');

    if (redirect) {
         window.location.href = 'nextpage.html';
    }else{
         window.history.back();
         // or window.history.go(-1);
    }
}

The History API is only supported in IE10 and up

Answer 3

Use confirm .

var r = confirm('Total Grants & Others Spending should be LESS THAN Total State Tourism Office Spend Funding');
                if (r == true) {
                    // do if yes,
                } else {
                    // do if no.
                    return false;
                }