// JavaScript Document
function MDTtoUTC(DateVector)
{
	DateVector[3] = (DateVector[3] + 7);
		if(DateVector[3] > 23){
			DateVector[2] += 1;
			DateVector[3] += 23;
 }
 return DateVector;
}

function message_visitors()
{
 var cDate = new Date();
 var time = [cDate.getUTCFullYear(),cDate.getUTCMonth()+1, cDate.getUTCDate(), cDate.getUTCHours()];
 var messageStart = [2009,12,15,0];
 var UTCmessageStart = MDTtoUTC(messageStart);
 var messageExpiry = [2009,12,15,16]; 
 var UTCmessageExpiry = MDTtoUTC(messageExpiry);
 var message = "Our power company is having a scheduled power outage due to construction and MRI's power will be out on Tuesday, December 15th from 8 a.m. to 4 p.m. MDT. We apologize for any inconvenience that this my cause. Please feel free to email us or call us when the power is back on. \nThank you.";
 var counter = 0;
 for(var i = 0; i < 4; i++)
 {
 	if(time[i] >= UTCmessageStart[i] && time[i] <= UTCmessageExpiry[i])
		counter++;
 }
 
 if(counter == 4)
	alert(message);
}