var nbimage= 50;
var width;
var height;
var url;
var alte;

function conference()
{
numimage= Math.round(Math.random()*(nbimage-1)+1);
if (numimage <= 10)
{
gotosite = "";
url = "images/vignette_conference_1.jpg";
alte = "Sonorisation de conférence";
}
if (numimage > 10 && numimage <= 20)
{
gotosite = "";
url = "images/vignette_conference_2.jpg";
alte = "Sonorisation de conférence";
}
if (numimage > 20 && numimage <= 30)
{
gotosite = "";
url = "images/vignette_conference_3.jpg";
alte = "Sonorisation de conférence";
}
if (numimage > 30 && numimage <= 40)
{
gotosite = "";
url = "images/vignette_conference_4.jpg";
alte = "Sonorisation de conférence";
}
if (numimage > 40)
{
gotosite = "";
url = "images/vignette_conference_5.jpg";
alte = "Sonorisation de conférence";
}
if(gotosite != "")
	{
	document.write ('<A HREF="' + gotosite + '">');	
	}
document.write('<IMG SRC="' + url + '" ALT="' + alte + '" BORDER=0>')
if(gotosite != "")
	{
	document.write('</A>')
	}
}


function evenementiel()
{
numimage= Math.round(Math.random()*(nbimage-1)+1);
if (numimage <= 10)
{
gotosite = "";
url = "images/vignette_evenementiel_1.jpg";
alte = "Evènementiel";
}
if (numimage > 10 && numimage <= 20)
{
gotosite = "";
url = "images/vignette_evenementiel_2.jpg";
alte = "Evènementiel";
}
if (numimage > 20 && numimage <= 30)
{
gotosite = "";
url = "images/vignette_evenementiel_3.jpg";
alte = "Evènementiel";
}
if (numimage > 30 && numimage <= 40)
{
gotosite = "";
url = "images/vignette_evenementiel_4.jpg";
alte = "Evènementiel";
}
if (numimage > 40)
{
gotosite = "";
url = "images/vignette_evenementiel_5.jpg";
alte = "Evènementiel";
}
if(gotosite != "")
	{
	document.write ('<A HREF="' + gotosite + '">');	
	}
document.write('<IMG SRC="' + url + '" ALT="' + alte + '" BORDER=0>')
if(gotosite != "")
	{
	document.write('</A>')
	}
}


function technique()
{
numimage= Math.round(Math.random()*(nbimage-1)+1);
if (numimage <= 10)
{
gotosite = "";
url = "images/vignette_technique_1.jpg";
alte = "Prestations techniques";
}
if (numimage > 10 && numimage <= 20)
{
gotosite = "";
url = "images/vignette_technique_2.jpg";
alte = "Prestations techniques";
}
if (numimage > 20 && numimage <= 30)
{
gotosite = "";
url = "images/vignette_technique_3.jpg";
alte = "Prestations techniques";
}
if (numimage > 30 && numimage <= 40)
{
gotosite = "";
url = "images/vignette_technique_4.jpg";
alte = "Prestations techniques";
}
if (numimage > 40)
{
gotosite = "";
url = "images/vignette_technique_5.jpg";
alte = "Prestations techniques";
}
if(gotosite != "")
	{
	document.write ('<A HREF="' + gotosite + '">');	
	}
document.write('<IMG SRC="' + url + '" ALT="' + alte + '" BORDER=0>')
if(gotosite != "")
	{
	document.write('</A>')
	}
}